Creative diaphragm designs are used to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure an exclusive four stage heat treating process for unparalleled performance.

Most ACT pressure plates are certified as meeting SFI Specification 1.1. and are legal for competition in all racing organizations where SFI certification is required.

All ACT pressure plates are dynamically computer balanced for smooth operation at high rpm.

ACT carefully selects the right amount of cushioning between the linings to allow for good engagement characteristics without sacrificing performance.

Most ACT spring centered assemblies use bushings and cone springs similar to factory clutch discs. This creates frictional dampening which improves clutch life and reduces noise.

Spring retainers by ACT utilize a wrap around spring window that not only gives liberal support for the springs, but also reduces stress concentrations that are a common cause for failure. (Offered on most ACT Modified and Performance Street Discs)

Heavy duty torsional dampening springs are stronger in most cases than standard springs and are provided in the best sizes and spring rates to suit the application.

ACT Performance Street Discs feature a high copper content friction material. Through the use of copper the heat is pulled away from the surface. ACT achieves better heat tolerance and faster recovery from overheating.

Top grade rivets are used to securely fasten the part together. Rivet design and rivet materials are carefully selected for maximum strength.

Spring windows on most ACT street discs are heat treated to resist wear, increase strength and reduce the chance of springs "popping" out.